<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<style>
  .top {
    margin: 0 auto;
    width: 1000px;
    height: 300px;
    background-color: pink;
  }
  .bottom {
    height: 100px;
  }
  .left {
    width: 200px;
    height: 300px;
    background-color: #cccccc;
  }
  .right {
    width: 790px;
    height: 300px;
    background-color: skyblue;
  }
  .clearfix {
    clear: both;
  }
</style>
<body>
<div class="top">
<div class="right"></div>
<div class="clearfix"></div>
</div>
<div class="bottom"></div>
</body>
</html>
